Anzaldo Formation
The Anzaldo Formation is a Katian geologic formation of central Bolivia. The formation belongs to the Cochabamba Group, overlies the Capinota Formation and is overlain by the San Benito Formation. The formation is famous for being where Sacabambaspis, a jawless fish that has become a popular internet meme in recent years, was discovered.
Fossil content
The formation has provided the following fossils:Fish
;Pteraspidomorphi- Huemacaspis bistrami
- ''Sacabambaspis janvieri''
Trilobites
- ''Leiostegina inexpectans''
Bivalves
- ?Grammysia sp.
- ?Modiomorpha sp.
- ?Parallelodon sp.
- "Ctenodonta" sp.
- ''"Goniophorina" sp.''
Gastropods
- ''Gyrospira tourteloti''
Lingulida
- Bistramia elegans
- ''Dignomia munsterii''